Heat exchanger with gas venting means



FIG. 1 is a front elevation of a heat exchanger with gas venting means showing our new design;

FIG. 2 is a left side elevation thereof;

FIG. 3 is a right side elevation thereof;

FIG. 4 is a top plan thereof; and

FIG. 5 is a bottom plan thereof. 

The ornamental design for a heat exchanger with gas venting means, as shown and described. 